BESTFIT Mainspring JA726 for Waltham 6s Factory No. 2217 - Alloy

BESTFIT Mainspring MS-JA726 for 6s Waltham, Factory No. 2217, alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.